Gumming appliance



Jan. 1, 1935. R, w, MCLEAN 1,986,277

GUMMING APPLIANCE Filed Sept. 5, 1933 4g 1 7 Z5 Z5 I 12W irez/167%? y @MQW Patented Jan, 1, 1935 'eulmvnNG APPLIANCE ...Robert McLean, Bridgewater, lil/lass.,` assigner to' Carver Cotton Gin"Compan'y, 4East Bridge' water, Mass., a corporation o'f Massachusetts ApplicationSeptember 5, ,-1933, 'Serial No. 1688,144

j Claims.

ThisA invention pertains to gumming appliances forl'use/ ingumming'saw blades, and is particularly intended for usein a"'sawi'gumming"`ma 1 -end of 'the Acutter to strike end-on agamstjthe ,Y f-5fpli'cation for Letters "Patent Serial No."688,145,

lchineof` the typedisclosed in my copending 'ap- "led :September: 5; '1933; ibut I contemplate 'that "in"'its"broader aspects it"maythave'usefulnessj in p adapted, if Athe saw and cutter are not accurately positioned-as theyv lapproachfto ease the con- "gumming machines of' specically idifferent characterior in'other mechanisms or relationships.

i In 4gumming aginIsaWLcylinder, according to "'themode 'of" procedure'described in myafore-v n said application,the gumming. instrumentality, hereispecicallydisclosed as a cutter or'le, is

advanced always inthesame"direction"'while ac- 5 L 'tually cutting fromone saw blade `of fthe series to anotherJAfteraggiven 'cutter' of the' saw 'passes"the`.last saw 'at the end of the cylinder, it is returned tothe lopposite end 'of the series Without contact With the saws, ready to begin another cutting operation. In ordernvexpeditiously to -cutor deepen. the ,notches between. .Y y. Y

larged scale;4 substantially "onf lthelme Alr-1490i ,..pilrposeaof` the'gumming-operation, l.it is desir- ...able-:to cut material fromlboth sides of the-tooth teeth;

T A .nfotchat theAsame time, andltathisend Lprov-ide material atopposite edgesoflthe notch-bythe same advancing movement of the cutter. l

z-.Since 4inaccordancewith my preferred meth- ;odof procedurethe cutter is moved ina continfuous-or,closed-path,conveniently-being carriedl n movable clampmgrl element;

.ony an endless chain passing about suitable guide V.,.vvheelsvyor thelike, :itis .necessary to :limitvthe lengthof the cutter so`as-to insure fthe desired n exibilitynf the chain,A andat the same time it f isgdesirable-tohave thefcutteri'rigidly supported Whilein -1contact--.with :the Work. l-Withv these rdimiting. 1 factors in= view, I make Y my cutter' of i. ithe-rcutterfjbetweerr ai pairzfulrigid and accuratelyr nished clamping elements. constituting. parts. cf 50,'.a cutteriholder. Furthermo're, in order that'the .cuttermay cut: both edges-bf the -toothnotch1si cmultaneously during-.advanceuof the cutter ,in a v given-.direction'l preferably arrange the Cutting (,Cl. Vi6-132) ting edges-of the' teeth'ofv-both series' are-ldiirom'the right-hand side of "Fig: ljfor' example;

" and or #that vvof-a saw blade. lpreferably `substantially "rectangular and some- *what elongate, '5 and `has varear substantiallyM The body portion Ais alsoirv "furnished `With openings 3 and v4 -o'r:otner' 'equivaient meanslfor the Yrece'ptioxrof a'clampingele- -rectedftoward the same end 'of the cutter;

As'-damage-might result were the advancing face-'of af Ysavv dislrfv 'propose-to'icut vavvay "the if corner -of the cutter,- "at/:leastV at 'the Iadvancing end thereof, 4to'pr'ovide'a"camlike *surface tactibetween them and gradually bring 'theparts 10 into proper Vrelationship so that theif'cuttermay perform lits intended `function.

In' lthe Y- accompanyingl `dra'wmg, vvherein-r `eertain' Ydesirable'embodiments 'of l1the 'invention are illustrated bywayof example, 15

Fig.` 2 is a'bottom view'of thesarnecutter;`

1'lig. 3 Ais an end elevation of the `cutterlooking m20 Y '-'Figz 4*- is ya' `fragmentary section; to greatly 'en- Fig. 2, showingfithearrangementoi thecutter *Fig 5 isany edgeelevationof the cutterfoff`25 amcutter-a adapted Hsimultaneously-to.` cut'.i away @Figi 1;

Fig.` 6- is an `enel 'elevationof a cutterliolder' -or carrier 'of ldesirable 'construction havingthe 'out- -ter v'mounted therein;

`Al`li*ig.V '7 is'a bottomV planA view V'of the'cutter holder of Fig.V 6, 4ornitting'the cutter and there- Fig.v 8 is a plan View of the clampingelement "re'moved' from the" holder; and

ing a modied formf'of cutter.

-Refer'ring-to the drawing, "the cutterbody 1 is preferably/made from a'pieceof relatively thin n"steelplate v'of 'substantially `uniform thickness lacharacter suitable for use in-makingA740 cutters orles for cutting or ling'metal'suchas This bodyyportion 1 is straight margin 2.

mentor elements.' At itsforward part'the'bdy ofthe cutter is' furnished with amargin ffvvhichI `-is substantially V-shape 4in vvertical cross sec-` 0 -tion,' having 4the upper inclined surface; 6` 4and v`the lovver inclined surface 7,'such' suriaces prei- "fer'ably converging toa substantially straight cast-iron, and as here illustrated thisbody portion is furnished with inclined guide surfaces vstantially rectangular body portlon of steel plate of the cutter or file. A clamping member 24, al-v so preferably rigid and of cast-iron or the like, is

section, as here illustrated, it is contemplated that rfor cutting tooth notches of unsymmetrical shapes, it may be desirable to incline one of the surfaces 6 with respect to the plane of the body portion at a dierent angle from that which the other surface '7 makes with the plane of the body portion.

In accordance with, a preferred procedure, the edge 8 is first provided with fine teeth 8, and thereafter on each of the faces 6 and 7 'is cut a series of teeth 9 and 10, respectively. These teeth may be formed in any approved manner, for example by millingg-or, as file teeth, bya method known to those skilled in theilefmaking art. As here illustrated theteeth are typical le teeth, and the teeth of lboth series are so arranged that their cuttingedges lean toward the same end of the cutter, or, as .it may for con venience be referred to, the file. Preferably also these file teeth are inclined or make an acute angleY withthe redge 8, the teeth of both series meetingV .this Vedge y.at substantially-b the same anglepthe cutter or` iile'being heat-treated to harden it in any approved manner afterthe teeth have been` cut. While I suggest the use fof a cutter having Vmetallic teeth as most desirable, I contemplate the use of a cutter having v.cutting elements vof some` non-metallic abrasive as within the purview of the invention. Preferably both ends of the beveled margin 5 `of the cutter are cut away, 'as shownat 11 and 12, respectively,.so as to furnish cam-like surfaces thereby to preventV abrupt and injurious contact of the end -of the cutter or iile as the.

latter is advanced toward the saw blade. A

y.While 1 contemplstethat this Yimproved cut.

ter maybe supported in otherjways and by other means than that herein illustrated, I prefer to employ a file holder or carrier comprising a body 13 of substantially rigid material, for example 14 and l5 at its upper edge, and with inclined guide surfaces 16 and'l'?- at its lower edge, such A surfaces being intended to engage and to slide,v along 'suitable guides provided in the gumming suitable Ydrive member, for example, a pin (not shown) carried by a chain link, such pin being ysecured to the body portion of the holder by means of a cotter Vwhich may be passed downr through a bore 19 in the body portion, such bore Y tion having teeth out thereon, said surfaces intersecting the opening 18.

The body portion of the holder is furnished with a forwardly projecting shelf 20 preferably.

integral with said body portion, such shelf projectingr from a substantially vertical finished' 'Ihe under side of thev a plane perpendicular to the surface 21 and' adapted to engage the upper surface of the body furnished with a pair of. spaced nished surfaces Y25 and 26 adapted to `engage the under surface. vof. thelebody 1.` The shelf 20 is pro- .vided with-a pair of spaced openings 3a and 4a,

fand the removable Vclamping member 24 is fur- {nished with apair of spaced openings 3b. and 4b,

the latter openings preferably .being screwthreaded. The openings `in the-shelf 20 and in holder is moved along the guideway. When a Vfile is worn it is merely necessary to loosen the bolts 27, whereupon the clamping plate 24 may be removed'and the worn file exchanged for a i5 new one.

When clamped in position, the rear margin 2 of the cutter bears against the surface 21 of the holder, thus furnishing a rigid abutment to take the thrust of the cutter during the cut- 20 ting action, such thrust, in turn,. being sustained by the vguides which engage the lguide surfaces of the holder. A

InLFig. 9 I have illustrated a slight modification of my cutter in which the body portion 1a; 25 is furnished with beveled margins 5a and 5h at its front and, rear edges, respectively, each of said margins being furnished with file teeth. Such av cutter, after the teeth are worn at one margin, may be taken out and reversed edge for 30 edge, soas to give double the wear of the file While the embodiments of vthe invention herein illustrated are desirable and preferable for the specific purpose ofgumming'gin saw cyl-f35 inders, 'I contemplate lthat cutters or files of generally similar type, but modified forv other particular uses, may be made'within the Vscope of my inventionas set forth in the appended claims.

Il claim: 1. A saw gumming device comprising a subhaving one'margin, at least, beveled to provide upper and lower inclined faces, each of said 145 faces having a series of teeth thereon, said marginy having its opposite 'ends `beveled to prevent abrupt and injurious contact l with the saw teeth.

2. A saw gummer device for use in a machine 50 of the class described, said device comprising a body portion having means for securing it to a holder, and having a marginal portion of substantially V-'shape in vertical cross section, the upper and lower surfaces of said marginal por-3- 55 eled to prevent abrupt and injurious contact with the saw teeth. 6 3. A gumming cutter comprising an elongate substantially rectangular piece of steel plate having a body portion provided with a-beveled margin of substantially V-shape in a section perpendicular-to the plane of the blade, the inclin'ed'faces of said margin meeting in a substantially straight edge, said faces having teeth cut thereon, thebody portion having an opening therethrough, and in combination withsaid cutter, a holder therefor comprising a substan-` tially rigid body portion having finished surfaces for engagement with the rear edge and with one side of the cutter respectively, and a I clamping elementhaving a surface for engageclamping means comprising a part adapted to pass through an opening in the cutter body and to clamp the cutter between the body portion of the holder and said clamping element.

4. A gumming cutter comprising a `piece -of steel plate having a substantially rectangular body portion provided with a beveled margin having convergent surfaces meeting substantially in a straight toothed edge at the mid-plane of the body portion, the opposite margin of the body portion being substantially straight, the body portion having a plurality of openings therethrough and the beveled margin being cut away at its opposite ends to provide cam surfaces, said beveled margin having teeth on its upper and lower surfaces, and in combination therewith a holder comprising a rigid body portion provided with guide-engaging surfaces and with elements whereby it may be moved along suitable guides, said rigid body portion of the holder having two surfaces substantially perpendicular to each other, one of said surfaces forming an abutment for the rear margin of the cutter, andthe other furnishing a rest for engagement with one face of the cutter body, a rigid clamping member having a surface for engagementwith the other side of the cutter body, and bolts arranged to pass through the openings in the cutter body and to clamp the cutter between said clamping member and the surface of the body portion of the holder.

5. A saw gummer device for use in a machine a body portion of steel plate, said plate having '1oy of the class4 described, said device comprising a pair of substantially parallel marginal portions y each of substantially V-shape in transverse cross n section, the upper and lower faces of each marginal portion respectively meeting in a substantially rectilinear edge, each of such faces having a series of teeth thereon, and each of said marginal portions having one end at least beveled to prevent abrupt and injurious contact with the saw teeth. l

ROBERT W. McLEAN. 

